NASHVILLE, Tenn. (AP) — The shooter who killed three students and three staff members at a Christian school in Nashville legally bought seven weapons in recent years and hid the guns from their parents before carrying out the attack by firing indiscriminately at victims and spraying gunfire through doors and windows, police said Tuesday.

The violence Monday at The Covenant School was the to roil the nation and was planned carefully. The shooter had of the school, including potential entry points, and conducted surveillance of the building before carrying out the massacre, authorities said.

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